The website will automatically show you cards you can trade with other users
Common things one can do with Trainer cards are healing their pokemon, giving them a buff that increases their damage, or alters the field of battle to give one a specific advantage (like with Stadium cards)
Plus its a damage trigger, and those are hard, so Commander-only, and mostly jank at that
In Astral Radiance, players will be able to pull Machamp as a rare VMAX card in its Gigantamax form
Oh, also, if it goes into your graveyard from anywhere it instantly gets shuffled back into your deck
Which Box Should You Buy If you want to draft with friends, build a broad collection, and get the best per-pack value, a play booster box is the way to go